diff --git a/tests/neg-macros/delegate-match-1/Macro_1.scala b/tests/neg-macros/delegate-match-1/Macro_1.scala
index 2a4dc426d9d1..a697bcf715d9 100644
--- a/tests/neg-macros/delegate-match-1/Macro_1.scala
+++ b/tests/neg-macros/delegate-match-1/Macro_1.scala
@@ -6,15 +6,15 @@ inline def f: Any = ${ fImpl }
 private def fImpl(given qctx: QuoteContext): Expr[Unit] = {
   import qctx.tasty.{_, given}
   searchImplicit(('[A]).unseal.tpe) match {
-    case IsImplicitSearchSuccess(x) =>
+    case x: ImplicitSearchSuccess =>
       '{}
-    case IsDivergingImplicit(x) => '{}
+    case x: DivergingImplicit => '{}
       error("DivergingImplicit\n" + x.explanation, rootPosition)
       '{}
-    case IsNoMatchingImplicits(x) =>
+    case x: NoMatchingImplicits =>
       error("NoMatchingImplicits\n" + x.explanation, rootPosition)
       '{}
-    case IsAmbiguousImplicits(x) =>
+    case x: AmbiguousImplicits =>
       error("AmbiguousImplicits\n" + x.explanation, rootPosition)
       '{}
   }
diff --git a/tests/neg-macros/delegate-match-2/Macro_1.scala b/tests/neg-macros/delegate-match-2/Macro_1.scala
index 2a4dc426d9d1..a697bcf715d9 100644
--- a/tests/neg-macros/delegate-match-2/Macro_1.scala
+++ b/tests/neg-macros/delegate-match-2/Macro_1.scala
@@ -6,15 +6,15 @@ inline def f: Any = ${ fImpl }
 private def fImpl(given qctx: QuoteContext): Expr[Unit] = {
   import qctx.tasty.{_, given}
   searchImplicit(('[A]).unseal.tpe) match {
-    case IsImplicitSearchSuccess(x) =>
+    case x: ImplicitSearchSuccess =>
       '{}
-    case IsDivergingImplicit(x) => '{}
+    case x: DivergingImplicit => '{}
       error("DivergingImplicit\n" + x.explanation, rootPosition)
       '{}
-    case IsNoMatchingImplicits(x) =>
+    case x: NoMatchingImplicits =>
       error("NoMatchingImplicits\n" + x.explanation, rootPosition)
       '{}
-    case IsAmbiguousImplicits(x) =>
+    case x: AmbiguousImplicits =>
       error("AmbiguousImplicits\n" + x.explanation, rootPosition)
       '{}
   }
diff --git a/tests/neg-macros/delegate-match-3/Macro_1.scala b/tests/neg-macros/delegate-match-3/Macro_1.scala
index 2a4dc426d9d1..a697bcf715d9 100644
--- a/tests/neg-macros/delegate-match-3/Macro_1.scala
+++ b/tests/neg-macros/delegate-match-3/Macro_1.scala
@@ -6,15 +6,15 @@ inline def f: Any = ${ fImpl }
 private def fImpl(given qctx: QuoteContext): Expr[Unit] = {
   import qctx.tasty.{_, given}
   searchImplicit(('[A]).unseal.tpe) match {
-    case IsImplicitSearchSuccess(x) =>
+    case x: ImplicitSearchSuccess =>
       '{}
-    case IsDivergingImplicit(x) => '{}
+    case x: DivergingImplicit => '{}
       error("DivergingImplicit\n" + x.explanation, rootPosition)
       '{}
-    case IsNoMatchingImplicits(x) =>
+    case x: NoMatchingImplicits =>
       error("NoMatchingImplicits\n" + x.explanation, rootPosition)
       '{}
-    case IsAmbiguousImplicits(x) =>
+    case x: AmbiguousImplicits =>
       error("AmbiguousImplicits\n" + x.explanation, rootPosition)
       '{}
   }
diff --git a/tests/neg-macros/tasty-macro-assert-1/quoted_1.scala b/tests/neg-macros/tasty-macro-assert-1/quoted_1.scala
index 5f5e5c31f6ee..c0d830772f19 100644
--- a/tests/neg-macros/tasty-macro-assert-1/quoted_1.scala
+++ b/tests/neg-macros/tasty-macro-assert-1/quoted_1.scala
@@ -18,7 +18,7 @@ object Asserts {
     val tree = cond.unseal
 
     def isOps(tpe: TypeOrBounds): Boolean = tpe match {
-      case IsTermRef(tpe) => tpe.termSymbol.isDefDef && tpe.name == "Ops"// TODO check that the parent is Asserts
+      case tpe: TermRef => tpe.termSymbol.isDefDef && tpe.name == "Ops"// TODO check that the parent is Asserts
       case _ => false
     }
 
diff --git a/tests/neg-macros/tasty-macro-assert-2/quoted_1.scala b/tests/neg-macros/tasty-macro-assert-2/quoted_1.scala
index 6e16d67cf112..7e3a7159dab5 100644
--- a/tests/neg-macros/tasty-macro-assert-2/quoted_1.scala
+++ b/tests/neg-macros/tasty-macro-assert-2/quoted_1.scala
@@ -18,7 +18,7 @@ object Asserts {
     val tree = cond.unseal
 
     def isOps(tpe: TypeOrBounds): Boolean = tpe match {
-      case IsTermRef(tpe) => tpe.termSymbol.isDefDef && tpe.name == "Ops"// TODO check that the parent is Asserts
+      case tpe: TermRef => tpe.termSymbol.isDefDef && tpe.name == "Ops"// TODO check that the parent is Asserts
       case _ => false
     }
 
diff --git a/tests/run-custom-args/Yretain-trees/tasty-extractors-owners/quoted_1.scala b/tests/run-custom-args/Yretain-trees/tasty-extractors-owners/quoted_1.scala
index ab6f853cb7ab..e7ded9fa7cf1 100644
--- a/tests/run-custom-args/Yretain-trees/tasty-extractors-owners/quoted_1.scala
+++ b/tests/run-custom-args/Yretain-trees/tasty-extractors-owners/quoted_1.scala
@@ -14,12 +14,12 @@ object Macros {
     val output = new TreeTraverser {
       override def traverseTree(tree: Tree)(implicit ctx: Context): Unit = {
         tree match {
-          case IsDefinition(tree @ DefDef(name, _, _, _, _)) =>
+          case tree @ DefDef(name, _, _, _, _) =>
             buff.append(name)
             buff.append("\n")
             buff.append(tree.symbol.owner.tree.showExtractors)
             buff.append("\n\n")
-          case IsDefinition(tree @ ValDef(name, _, _)) =>
+          case tree @ ValDef(name, _, _) =>
             buff.append(name)
             buff.append("\n")
             buff.append(tree.symbol.owner.tree.showExtractors)
diff --git a/tests/run-macros/flops-rewrite-2/Macro_1.scala b/tests/run-macros/flops-rewrite-2/Macro_1.scala
index 9e7424ed2bd2..97ee354c8611 100644
--- a/tests/run-macros/flops-rewrite-2/Macro_1.scala
+++ b/tests/run-macros/flops-rewrite-2/Macro_1.scala
@@ -76,13 +76,13 @@ private class Rewriter(preTransform: List[Transformation[_]] = Nil, postTransfor
     import qctx.tasty.{_, given}
     class MapChildren extends TreeMap {
       override def transformTerm(tree: Term)(given ctx: Context): Term = tree match {
-        case IsClosure(_) =>
+        case _: Closure =>
           tree
-        case IsInlined(_) | IsSelect(_) =>
+        case _: Inlined | _: Select =>
           transformChildrenTerm(tree)
         case _ =>
           tree.tpe.widen match {
-            case IsMethodType(_) | IsPolyType(_) =>
+            case _: MethodType | _: PolyType =>
               transformChildrenTerm(tree)
             case _ =>
               tree.seal match {
diff --git a/tests/run-macros/flops-rewrite-3/Macro_1.scala b/tests/run-macros/flops-rewrite-3/Macro_1.scala
index 05df12a82f97..55543e0a7c8a 100644
--- a/tests/run-macros/flops-rewrite-3/Macro_1.scala
+++ b/tests/run-macros/flops-rewrite-3/Macro_1.scala
@@ -112,13 +112,13 @@ private class Rewriter private (preTransform: List[Transformation] = Nil, postTr
     import qctx.tasty.{_, given}
     class MapChildren extends TreeMap {
       override def transformTerm(tree: Term)(given ctx: Context): Term = tree match {
-        case IsClosure(_) =>
+        case _: Closure =>
           tree
-        case IsInlined(_) | IsSelect(_) =>
+        case _: Inlined | _: Select =>
           transformChildrenTerm(tree)
         case _ =>
           tree.tpe.widen match {
-            case IsMethodType(_) | IsPolyType(_) =>
+            case _: MethodType | _: PolyType =>
               transformChildrenTerm(tree)
             case _ =>
               tree.seal match {
diff --git a/tests/run-macros/flops-rewrite/Macro_1.scala b/tests/run-macros/flops-rewrite/Macro_1.scala
index 4c432283b74c..d78df3dc4cbf 100644
--- a/tests/run-macros/flops-rewrite/Macro_1.scala
+++ b/tests/run-macros/flops-rewrite/Macro_1.scala
@@ -58,13 +58,13 @@ private class Rewriter(preTransform: Expr[Any] => Expr[Any], postTransform: Expr
     import qctx.tasty.{_, given}
     class MapChildren extends TreeMap {
       override def transformTerm(tree: Term)(given ctx: Context): Term = tree match {
-        case IsClosure(_) =>
+        case _: Closure =>
           tree
-        case IsInlined(_) | IsSelect(_) =>
+        case _: Inlined | _: Select =>
           transformChildrenTerm(tree)
         case _ =>
           tree.tpe.widen match {
-            case IsMethodType(_) | IsPolyType(_) =>
+            case _: MethodType | _: PolyType =>
               transformChildrenTerm(tree)
             case _ =>
               tree.seal match {
diff --git a/tests/run-macros/inferred-repeated-result/test_1.scala b/tests/run-macros/inferred-repeated-result/test_1.scala
index b9c4f7a36b6e..e84035e40901 100644
--- a/tests/run-macros/inferred-repeated-result/test_1.scala
+++ b/tests/run-macros/inferred-repeated-result/test_1.scala
@@ -11,9 +11,10 @@ object Macros {
     val methods =
       tree.tpe.classSymbol.get.classMethods.map { m =>
         val name = m.show
-        val IsDefDef(ddef) = m.tree
-        val returnType = ddef.returnTpt.tpe.show
-        s"$name : $returnType"
+        m.tree match
+          case ddef: DefDef =>
+            val returnType = ddef.returnTpt.tpe.show
+            s"$name : $returnType"
       }.sorted
 
     methods.foldLeft('{}) { (res, m) => '{ $res; println(${m}) } }
diff --git a/tests/run-macros/tasty-custom-show/quoted_1.scala b/tests/run-macros/tasty-custom-show/quoted_1.scala
index 699e4b11da68..361e7ffa1f82 100644
--- a/tests/run-macros/tasty-custom-show/quoted_1.scala
+++ b/tests/run-macros/tasty-custom-show/quoted_1.scala
@@ -17,12 +17,12 @@ object Macros {
         // Use custom Show[_] here
         val printer = dummyShow
         tree match {
-          case IsDefinition(tree @ DefDef(name, _, _, _, _)) =>
+          case tree @ DefDef(name, _, _, _, _) =>
             buff.append(name)
             buff.append("\n")
             buff.append(printer.showTree(tree))
             buff.append("\n\n")
-          case IsDefinition(tree @ ValDef(name, _, _)) =>
+          case tree @ ValDef(name, _, _) =>
             buff.append(name)
             buff.append("\n")
             buff.append(printer.showTree(tree))
diff --git a/tests/run-macros/tasty-eval/quoted_1.scala b/tests/run-macros/tasty-eval/quoted_1.scala
index 25c26026b850..6ab7b509ae9c 100644
--- a/tests/run-macros/tasty-eval/quoted_1.scala
+++ b/tests/run-macros/tasty-eval/quoted_1.scala
@@ -21,12 +21,13 @@ object Macros {
       import qctx.tasty.{_, given}
 
       e.unseal.tpe match {
-        case IsTermRef(pre) if pre.termSymbol.isValDef =>
-          val IsValDef(t) = pre.termSymbol.tree
-          t.tpt.tpe match {
-            case ConstantType(Constant(i: Int)) => Some(i)
-            case _ => None
-          }
+        case pre: TermRef if pre.termSymbol.isValDef =>
+          pre.termSymbol.tree match
+            case t: ValDef =>
+              t.tpt.tpe match {
+                case ConstantType(Constant(i: Int)) => Some(i)
+                case _ => None
+              }
         case ConstantType(Constant(i: Int)) => Some(i)
         case _ => None
       }
diff --git a/tests/run-macros/tasty-extractors-3/quoted_1.scala b/tests/run-macros/tasty-extractors-3/quoted_1.scala
index 8f3f4f414371..47f046ef8763 100644
--- a/tests/run-macros/tasty-extractors-3/quoted_1.scala
+++ b/tests/run-macros/tasty-extractors-3/quoted_1.scala
@@ -13,11 +13,11 @@ object Macros {
     val buff = new StringBuilder
     val traverser = new TreeTraverser {
       override def traverseTree(tree: Tree)(implicit ctx: Context): Unit = tree match {
-        case IsTypeBoundsTree(tree) =>
+        case tree: TypeBoundsTree =>
           buff.append(tree.tpe.showExtractors)
           buff.append("\n\n")
           traverseTreeChildren(tree)
-        case IsTypeTree(tree) =>
+        case tree: TypeTree =>
           buff.append(tree.tpe.showExtractors)
           buff.append("\n\n")
           traverseTreeChildren(tree)
diff --git a/tests/run-macros/tasty-macro-assert/quoted_1.scala b/tests/run-macros/tasty-macro-assert/quoted_1.scala
index 6c110c6c3eb4..48e02875deb9 100644
--- a/tests/run-macros/tasty-macro-assert/quoted_1.scala
+++ b/tests/run-macros/tasty-macro-assert/quoted_1.scala
@@ -18,7 +18,7 @@ object Asserts {
     val tree = cond.unseal
 
     def isOps(tpe: TypeOrBounds): Boolean = tpe match {
-      case IsTermRef(tpe) => tpe.termSymbol.isDefDef && tpe.name == "Ops"// TODO check that the parent is Asserts
+      case tpe: TermRef => tpe.termSymbol.isDefDef && tpe.name == "Ops"// TODO check that the parent is Asserts
       case _ => false
     }
 
diff --git a/tests/run-macros/tasty-seal-method/quoted_1.scala b/tests/run-macros/tasty-seal-method/quoted_1.scala
index f20333392d3f..b3f9c662681d 100644
--- a/tests/run-macros/tasty-seal-method/quoted_1.scala
+++ b/tests/run-macros/tasty-seal-method/quoted_1.scala
@@ -12,7 +12,7 @@ object Asserts {
     x.unseal.underlyingArgument match {
       case Apply(fn, args) =>
         fn.tpe.widen match {
-          case IsMethodType(_) =>
+          case _: MethodType =>
             args.size match {
               case 0 => Expr.betaReduce(fn.etaExpand.seal.cast[() => Int])()
               case 1 => Expr.betaReduce(fn.etaExpand.seal.cast[Int => Int])('{0})
diff --git a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TreeInterpreter.scala b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TreeInterpreter.scala
index 42c6fbba2ccc..499ce7aa014d 100644
--- a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TreeInterpreter.scala
+++ b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/TreeInterpreter.scala
@@ -26,11 +26,12 @@ abstract class TreeInterpreter[R <: Reflection & Singleton](val reflect: R) {
   def interpretCall(inst: AbstractAny, sym: Symbol, args: List[AbstractAny]): Result = {
     // TODO
     // withLocalValue(`this`, inst) {
-      val IsDefDef(ddef) = sym.tree
-      val syms = ddef.paramss.headOption.getOrElse(Nil).map(_.symbol)
-      withLocalValues(syms, args.map(LocalValue.valFrom(_))) {
-        eval(ddef.rhs.get)
-      }
+      sym.tree match
+        case ddef: DefDef =>
+          val syms = ddef.paramss.headOption.getOrElse(Nil).map(_.symbol)
+          withLocalValues(syms, args.map(LocalValue.valFrom(_))) {
+            eval(ddef.rhs.get)
+          }
     // }
   }
 
@@ -42,11 +43,12 @@ abstract class TreeInterpreter[R <: Reflection & Singleton](val reflect: R) {
       case _ =>
     }
     val evaluatedArgs = argss.flatten.map(arg => LocalValue.valFrom(eval(arg)))
-    val IsDefDef(ddef) = fn.symbol.tree
-    val syms = ddef.paramss.headOption.getOrElse(Nil).map(_.symbol)
-    withLocalValues(syms, evaluatedArgs) {
-      eval(ddef.rhs.get)
-    }
+    fn.symbol.tree match
+      case ddef: DefDef =>
+        val syms = ddef.paramss.headOption.getOrElse(Nil).map(_.symbol)
+        withLocalValues(syms, evaluatedArgs) {
+          eval(ddef.rhs.get)
+        }
   }
 
   def interpretValGet(fn: Term): Result =
@@ -207,8 +209,8 @@ abstract class TreeInterpreter[R <: Reflection & Singleton](val reflect: R) {
 
   private object Call {
     def unapply(arg: Tree): Option[(Term, List[TypeTree], List[List[Term]])] = arg match {
-      case IsSelect(fn) => Some((fn, Nil, Nil))
-      case IsIdent(fn) => Some((fn, Nil, Nil))
+      case fn: Select => Some((fn, Nil, Nil))
+      case fn: Ident => Some((fn, Nil, Nil))
       case Apply(Call(fn, targs, args1), args2) => Some((fn, targs, args1 :+ args2))
       case TypeApply(Call(fn, _, _), targs) => Some((fn, targs, Nil))
       case _ => None
diff --git a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/jvm/Interpreter.scala b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/jvm/Interpreter.scala
index 4387b6099684..1a6aabd1b09a 100644
--- a/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/jvm/Interpreter.scala
+++ b/tests/run-with-compiler-custom-args/tasty-interpreter/interpreter/jvm/Interpreter.scala
@@ -17,7 +17,7 @@ class Interpreter[R <: Reflection & Singleton](reflect0: R) extends TreeInterpre
       // Best effort to try to create a proxy
       val sym = fn.symbol.owner
       if (sym.isClassDef) {
-        val IsClassDef(tree) = sym.tree
+        sym.tree match case tree: ClassDef =>
         val parentSymbols = tree.parents.tail.map(_.asInstanceOf[TypeTree].symbol).head
         import java.lang.reflect._
         val handler: InvocationHandler = new InvocationHandler() {
diff --git a/tests/run-with-compiler/tasty-comment-consumer/Test.scala b/tests/run-with-compiler/tasty-comment-consumer/Test.scala
index 0bd98f3e789f..afe07c067528 100644
--- a/tests/run-with-compiler/tasty-comment-consumer/Test.scala
+++ b/tests/run-with-compiler/tasty-comment-consumer/Test.scala
@@ -14,7 +14,7 @@ class CommentConsumer extends TastyConsumer {
     object Traverser extends TreeTraverser {
 
       override def traverseTree(tree: Tree)(implicit ctx: Context): Unit = tree match {
-        case IsDefinition(tree) =>
+        case tree: Definition =>
           tree.symbol.comment match {
             case Some(com) => println(com.raw)
             case None => println()